Autódromo Juan y Oscar Gálvez · 15 January 1978
| Pos | Team | Points Breakdown | Pts | |
|---|---|---|---|---|
| 1 | Team Lotus Andretti 9 + Peterson 2 | Andretti 9 + Peterson 2 | 11 | |
| 2 | Brabham Lauda 6 + Watson 0 | Lauda 6 + Watson 0 | 6 | |
| 3 | Tyrrell Depailler 4 + Pironi 0 | Depailler 4 + Pironi 0 | 4 | |
| 4 | McLaren Hunt 3 + Tambay 1 + Lunger 0 | Hunt 3 + Tambay 1 + Lunger 0 | 4 | |
| 5 | Ferrari Reutemann 0 + Villeneuve 0 | Reutemann 0 + Villeneuve 0 | 0 | |
| 6 | Fittipaldi Fittipaldi 0 | Fittipaldi 0 | 0 | |
| 7 | Wolf Scheckter 0 | Scheckter 0 | 0 | |
| 8 | ATS Mass 0 + Jarier 0 | Mass 0 + Jarier 0 | 0 | |
| 9 | Shadow Regazzoni 0 + Stuck 0 | Regazzoni 0 + Stuck 0 | 0 | |
| 10 | Ligier Laffite 0 | Laffite 0 | 0 | |
| 11 | Surtees Brambilla 0 + Keegan 0 | Brambilla 0 + Keegan 0 | 0 | |
| 12 | Williams Jones 0 | Jones 0 | 0 | |
| 13 | Ensign Ongais 0 + Leoni 0 | Ongais 0 + Leoni 0 | 0 | |
| 14 | Merzario Merzario 0 | Merzario 0 | 0 |
| Pos | Driver | Team | Race time / Gap | Laps | Stops | Pts | |
|---|---|---|---|---|---|---|---|
| 1 | Mario Andretti Team Lotus | Team Lotus | 1:37:04.470 | 52 | — | 9 | |
| 2 | Niki Lauda Brabham | Brabham | +13.210s | 52 | — | 6 | |
| 3 | Patrick Depailler Tyrrell | Tyrrell | +13.640s | 52 | — | 4 | |
| 4 | James Hunt McLaren | McLaren | +16.050s | 52 | — | 3 | |
| 5 | Ronnie Peterson Team Lotus | Team Lotus | +1:14.850 | 52 | — | 2 | |
| 6 | Patrick Tambay McLaren | McLaren | +1:19.900 | 52 | — | 1 | |
| 7 | Carlos Reutemann Ferrari | Ferrari | +1:22.600 | 52 | — | — | |
| 8 | Gilles Villeneuve Ferrari | Ferrari | +1:38.880 | 52 | — | — | |
| 9 | Emerson Fittipaldi Fittipaldi | Fittipaldi | +1:40.600 | 52 | — | — | |
| 10 | Jody Scheckter Wolf | Wolf | +1:43.500 | 52 | — | — | |
| 11 | Jochen Mass ATS | ATS | +1:49.070 | 52 | — | — | |
| 12 | Jean-Pierre Jarier ATS | ATS | — | 51 | — | — | |
| 13 | Brett Lunger McLaren | McLaren | — | 51 | — | — | |
| 14 | Didier Pironi Tyrrell | Tyrrell | — | 51 | — | — | |
| 15 | Clay Regazzoni Shadow | Shadow | — | 51 | — | — | |
| 16 | Jacques Laffite Ligier | Ligier | — | 50 | — | — | |
| 17 | Hans-Joachim Stuck Shadow | Shadow | — | 50 | — | — | |
| 18 | Vittorio Brambilla Surtees | Surtees | — | 50 | — | — | |
| 19 | John Watson Brabham | Brabham | — | 41 | — | — | |
| 20 | Alan Jones Williams | Williams | — | 36 | — | — | |
| 21 | Danny Ongais Ensign | Ensign | — | 35 | — | — | |
| 22 | Lamberto Leoni Ensign | Ensign | — | 28 | — | — | |
| 23 | Arturo Merzario Merzario | Merzario | — | 9 | — | — | |
| 24 | Rupert Keegan Surtees | Surtees | — | 4 | — | — |